Molding



Jan. 3.192s; 1,654,721

P. H. CQNE HOLDING Filod June 21. 1927 A l m nn 5 MN MW V//////xZ7////A //////////A7///J7//// gwmnkoa',

or in superimposed sections'according tothe 1O Patented Jan 1928.

or cracmamx, cam; VA coerce mow or oHI'o.

'MOIJDING.

This invention relates to. improvements in molding and has particular reference to an improved .structure'of flask.

. fP-rio'r 'to thelpr esent invention difficulties have been experienced ;in ,prope-rl y retaining the mold sand within the flask, e'specia lly in, thfse types of flask having straightv 7 side walls adapted to be used either individually size of castiiigtobe produced. I

Attempts have beemmadeto aid in ietai'ning tliis sand -by -t'he' employme1it of 'firi's, ribs or the like'pr'ojec'ting interiorly of the flask. These have been objectionable, however, due to distortion of the sand and consequent unequal thickness thereof and have tended to produce chill spots, indentations or other defects in the finished casting.

It is therefore the obj ect of the presentinvention to provide an improved flask structure for the satisfactory retention of molds which will not deleteriously affect the castings produced therein. 1

A further object of the present invention is the provision of a structure, such that the interior of the'several flask sections will present a relatively straight and uniform wall and there will be no inequalities due to irregular inward projections or the like.

Other objects and advantages of the present construction should be readily apparent by reference to the following specification taken in conjunction with the accompanying drawings, and it will be understood that any modifications may be made within the scope of the appended claims without departing from or exceeding the spirit of the invention. 1

Figure 1 is a perspective view of a combined sectional flask embodying the present improvements.

Figure 2 is a vertical sectional view as on the line 2-2 of Figure 1, and

Figure 3 is a fragmentary section as on line 3-3 of Figure 2.

In the drawings the number 10 designates the main side wall of the mold flask section, having the upper and lower outwardly extending flange portions 11 connected by bracing ribs 12. The sections-may be further connected and braced as by the transverse bars 13. It will be understood that the sections here illustrated may be used as individual independent mold sections or may be com 1927. "Serial-No; 200, 187. l

bin-ed when. -greater height; desired. In

T theeventof combination the flange- 11 are suitably secured together as by the U-clamps mm? 'o cmcrmmm, euro, AssrenoaTQ MoDERNsOnmi-RY comm 14 and "interposed iw-edg'es 15 orin -other'si'1it able manner.

' Pr'marily the presentinvention relates to 7 I the means forf retaining the p acked sand or mold lfIl position within the flask. This mea nsYas is clearly illustrated in' Fig ures 2 R dfgcelnprimsa iserie's ofzflatwedgeshaped pro ections, 16, formed on the interior ofthe flasks'with their basesfat Iwhat is normally the lower edgeof the' fla s'ln These 'wedge members as shown are preferably disposed intermediate the bars 13. ward but a short distance from the face of wall 10 of the flask and being of equal thickness will form a substantially continuous sand retainingprojection as indicated in F lgure 2, so'far as the vertical plane is concerned.

At the same time they provide the downwardly converging faces 17 between which the sand ispacked so that so long as the particles in general adhere, the mold as an entirety cannot become loosened or moved downward relative to the flask. Also, on account'of the wedge formation any slight settling merely more firmly holds the bars in place, tending to compress them rather than gutting free-as would inwardly extending It will also be understood that on account of the construction shown the flasks may be readily cleaned and entirely freed.

from sand when desired and that when inverted the mold may be readily shaken free therefrom.

They extend in- It will be understood that in use the complete sectional flask which hasjbeen placed over the pattern 18 is inverted or turned upside down, so that the bars 13 are then located at thebase of the structureaiding in retaining the packed mold within the flask.

In this event the wedge formation of the members 16 supplements the action of the bars 13. The projecting portions 19 at the base of'the wedges extending laterally beyond the apexes of the adjacent members provide packed mold sand.

I claim 1. A mold flask'comprising a wall portion having formed on the inner face thereof a shoulders interlocking with r the having formed on the inner face thereof a plurality of projections of uniform thickness of substantially wedge shaped formation, the several Wedges having their bases disposed in the same direction to provide adjacent converging retaining Walls.

- 3. A sectional flask structure for molding,

comprising a plurality of flask sections having outwardly extending attachment flanges, said sections having inwardly" projecting Wedge members arranged in overlying uposition to provide a continuous staggered mold retaining Wall. g 4. A flask for molding purposes, comprisinga wall member having a plurality of equal thickness-projections formed on the inner face thereof, said projections being of non-uniform idth to provide retracted areas therebetween preventing accidental disengagement of a packed mold.

5. A mold flask of the nature described,

including a circumscribing Wall portion having transverse connecting members at one edge thereof and having its face formed With projections increasing in Width at points remote from'the connecting members.

6. A mold flask of the nature described,

including a circumscribing Wall portion hav- 'ing transverse connectingmembers at one comprising a plurality of membersjadapted to be'locate'd in super-imp'osed'relation, said members .eachbeing formed with Wedge shaped retaining projections whereby the pieces ofthe Wedges will form mold retaining shoulders when the sections are p as sembled. -f In testimonyvvhereof I aifix my signature PHILIP H. CONE 

